257860977377 has 4 divisors (see below), whose sum is σ = 258579253440. Its totient is φ = 257142701316.

The previous prime is 257860977349. The next prime is 257860977383. The reversal of 257860977377 is 773779068752.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257860977377 - 2¹⁰ = 257860976353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257860977307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359137493 + ... + 359138210.

It is an arithmetic number, because the mean of its divisors is an integer number (64644813360).

Almost surely, 2^257860977377 is an apocalyptic number.

It is an amenable number.

257860977377 is a deficient number, since it is larger than the sum of its proper divisors (718276063).

257860977377 is an equidigital number, since it uses as much as digits as its factorization.

257860977377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718276062.

The product of its (nonzero) digits is 217818720, while the sum is 68.

The spelling of 257860977377 in words is "two hundred fifty-seven billion, eight hundred sixty million, nine hundred seventy-seven thousand, three hundred seventy-seven".